Remote control for radio tuning device



May 2, 1933. H. MORIN 1,906,709

REMOTE CONTROL FOR RADIO TUNING DEVICE Filed Feb, l, 1930 6 Sheets-Sheetl l UM; my.; ATTORNEY May z, 1933.

| H. MORIN 1,906,709

REMOTE CONTROL FOR RADIO TUNING DEVICE Filed Feb, l. 195o 6 sheets-sheet 2 6 'Sheets-Shea?l I5 L. H. MORIN REMOTE CONTROL FOR RADIO TUNING DEVICE Filed Feb, l, 1930 May 2, 1933.

ATTORNEY May 2, 1933. H. MORIN REMOTE CONTROLFOR RADIO TUNING DEVICE 6 Sheets-Sheet 4 Filed Feb. l, 1930 INVENTOR 06W@ Jv. mm BY Jz'gf 6,

ATTORNEY May 2, 1933.

L. H. MORIN 1,906,709 REMOTE CONTROL FOR RADIO TUNING DEVICE Filed Feb. 1, 1930 e sheetsneet 5 74,2 74'/ I 723 ggz?! 77 767 76 fw 123 74'; w nsf I ri i i 5g? 1W l M (f7 i y a ffy I 1 l #'7 I /ff INVENTOR ATTORNEY May 2, 1933.

L. v H. MoRlN 1,906,709

REMOTE CONTROL FOR RADIO TUNING DEVICE Filed Feb. l, 1950 6 Sheets-Sheet 6 INVENTOR Mvszzm ATTORNEY '1o. No. 407,381

Patented May 2, y1933 LouIs II. MORIN, or NEW Yoan, N. inpassofrerortV TonoEIIIERDIn-CASTING;eo., a CORPORATION or'NEW-Yonx t Y,

v REMOTEV CONTROL Non,` Ramo TUNING i DEVICE l appncation mearebrnary 1, 1930. ysealan.f425,0 2.

This invention comprehends meansto tune a radio receiving set and vary the volume of the. sound emitted from the loud speaker associated therewith at a point remote from the set. It has a special application to sets which" are equipped With automatic tuning devices and in somerespects constitutes an improve-` ment in the devices shown in my co ending applications, l

iiledAugust 10,v v1929k and'November 15, 1929y respectively, the latter application having issued as Patent No.1 ,856,7 81 of May L3, 1932. In its broad aspect, the invention is independent of any particularl form of automatic tuner device, although spe'-Y cifically, the embodiment WhiehIhave selected for illustration is particularlydesigned to function With theform of automatic jtuner Y which constitutes thefsubject lmatter of my 201 copending Vvapplication, Serial No.y 355,190, and April 15,1929.;l

, Automatic tuners avoid the necessity of ay delicate or very particular adjustment ofthe dials in order to tunev a radio receiving'set Jinto resonance .with any selected Wave,and

enable oneto efecta selective tuningfbythe performance lof 'a simple mechanical operation that requiresno'delicacy of' control.. For thisvpurpose they `have a plurality of manu- 301 ally controlled actuating members which are` operatively related Y tothe `movable part kof thetuning element of the `set .and whichare independently adjustable with respect to such;

' relationship. Each actuatingmemberis thus 35. so set that Whenmanually operated itwill bring the tuning element into resonance with a particular' Wave length. In the form `of automatic tuner illustrated in my said copendingapp'lication SerialNo.:

4:0 355,190, the actuating members which are ad-k ustable WithV respect to the .movable member consist of single toothed pinions frictionally mountedxupon|` an operating shaft. and 4ad-l justable angularly thereon. The operating mechanism consists of apair of ring gears disposed side by side and fitting over the ypin;-` ions, and slidable longitudinally of the shaft n selectivelyintoregister Withthe pinions. The lring .gears have externalgear teethpand ea/ch 5'? lhas a single internal tooth, and suitable means,

rSerial No. 884,831 van `Serial Width to engage anabutmen't upon thev rack ingfof'thejlateral shifting and subsequent opsuch a "a rack, .isemployed to operate theV gears in opposite,.directio'ns.A The internal] gearv teeth .vvillbey stopped in 4their rotation'V when they are ,both in engagement with thev pinion Ytoothv .but ony opposite sides thereof. In order to vtune the setto any station corresponding to one of the single toothed pinions,`ithe rackwith itsring gears` is moved laterally into registerfwith that pinion and the rackis then moved longitudinally soas to rotate the two ring gears until their internal teeth engage fono'pposite sides f ofA the single toothl ofthe pinion. i This lateral shiftf ing and longitudinalactuation ofthe rack is effected manualy..

. 05 y In the form o remote control shown Vin my copendingwapplication Serial No.` 384,831, a

motor 1s cox'inect'ed` to eiifect` the `same movements of therack 'and ring gearsfwhen a manuall switch is 'operated at the; remote point. The transmission betvveenthese elements and the motor for the effecting of the lateral shifting'includes a shiftingdevice which is rotat? ableupon a shaft parallel to that upon which the .pinions are mountedandis 'also slidabley Vlongitudinally thereon,

and this 'shiftingl de-y vice isoperatively connected throughla piv- Aoted lever toy thehousing for 'the ,ring gears,

wherebya lateral movement of the shifting n device'is transmittedto the ring gears and rack.v This shifting device has an obliquel c'am face on its peripheral surface and the rotary Lmo vement A[which is imparted to the shifting device kby the motor is translated into alate'rallor axial movement by a plurality of*V Vabutment pins which are selectively Vinsertable `into the path ofthe cam face. The extent of theiaxia'l shifting of the jdevicedependsv uponvl which pin'lis inserted and-.this in turn" is controlled by thefmanua'l switch device at the remote 'controlfpoint ForA longitudinal actuation ofthe rackbyfthmOt'or a pivoted lever is connected Afor reiV ciprocatio'nl by thev motor :and @is Of sufficient 95 in anypos'ition of'lateralladjustment of the rack andassociatedparts. f 7 Y The improved transmissionv for f the eiect'-,

eration of the loperatingmeans shown inmy t copending application, Serial No. 407,881 above referred to, which is the transmission of the present invention with some improvements therein, includes a screw shaft which is rotatable in bearings provided therefor. A

nut having internal projections correspond-V lin turn is cont-rolled by the manual switch device at the remote control point.

The actuation of the ring gears is effected by a gear secured to the nut on the screw shaft to rotate therewith, and the nut rotates with lthe screw shaft when its further lateral movement is restrained by an abutment pin. Specifically, the nut is journaled in the housing for the ring gears. As the screw shaft is rotated the nut advances along the shaft and abutsagainst the side of the gear housing, thereby moving the housing laterally. When the housing strikes the abutment pin inserted in the path thereof, further lateral movement is restrained and the internal jprojections on the nut wedge in the threads ofthe screw shaft to rotate the nut therewith. Rotation of the nut rotates its gear with it, and this gear not only rotates one Aof the ring gears but also rotates a pinion which meshes jwith it and which also meshes with the rack,

therebyv effecting a longitudinal movement of thev rack.

Vhen the tuning of the set is completed and the screw shaft is released Vby action of the automatic clutch, the gear housing is returned to its original position by means of a spring. In connection with the vabove described tuning mechanism, I have 1nY accordance with the present invention provided a movc, able member which is operatively connected to affect the volume of the sound emitted from the sound reproducing elementl associated with the set.- Asingle power device is utilized to operate the timing mechanism and the voliime control. The power device is ,selectivelyV connectible to the transmission of the tuning device and to theinovable member operativelyconnected to affect the volume of the sound emitted from the sound reproducing device for the operation thereof.

Specifically, the motor for supplying power to operate the automatic tuning device is connectible to the power transmission mechanislniv for operating the automatic tuner Athrough an electromagnetic clutch. Associated with the magnetic clutch andactuatcd thereby, there is a selector device for connecting the motor to and disconnecting the motor from the movable member operatively connected to affect the volume of the sound emitted from the sound reproducing unit. Normally, the motor is connected to the movable member operatively connected to vary the volume, and the selector device is actuated to disconnect the motor therefrom upon the energization of the electromagnetic clutch to connect the motor to the power transmission mechanism for operating the automatic tuner. The energizatioii of the motor to'cause it to operate the movable member connected to vary the volume in one direction to increase the volume and in the opposite direction to decrease the volume, and the energization of the electromagnetic clutch to connect the motor to the power transmission mechanism for operating the automatic tuner are controlled by the manual switch device remote from the receiving set.

A normally closed switch, through which the circuit from the receiving set to the sound reproducing unit is completed is so located with respect to the magnetic clutch that it is opened by the operation of the clutch to connect the motor to the power transmission mechanism for operating the automatic timer, thereby breaking the circuit to the sound reproducing unit while the receiving set is being tuned.

Various other particulars of the invention will appear from the following description of the illustrated embodiment.

F ig` 1 is a side elevation partly in section of an embodiment of the invention installed in a cabinet, the front panel of which is s hown in section;

Fig. 2 is a vertical section through the automatic timing portion of the mechanism taken on the irregular line 2-2 of Fig. l;

Fig. 3 is a vertical sectional detail through the main or operating shaft of the automatic tuner and the parts carried thereby;

F 4 is a horizontal sectional detail with part of the niainor operating shaft of the automatic tuner broken away;

Fig. 5 is a side elevation of that part of the automatictuner shown in Fig. 4;

Fig. 6 is a longitudinal section through the clutch mechanism for selectively connecting the motor to the transmission of the tuning mechanism and the movable member associated with the volume control;

Fig. V" is an end elevation partly in section of the same;

Fig. 8 is a longitudinal and end elevation of a stub shaft and wormv utilized in the transmission of'power to the operating elements; c

Fig. 9 isa side and'end elevation of one form of clutch used in the mechanism;

Fig. 10 is a plan of the remote control box;

UST

*.F ig. .11 isa longitudinalsection of there-v mote control box taken on the irregularfline end ofthe stub shaft 18 meshes with a beveled 11'.11 lof-Fig. 10; e l vrFig. 12 is a plan of the` remote control box with the cover removed;

, Fig.v 13l-isk a longitudinal vsectional *eleva-'-y tion and tWo end elevations ofthe switch operatingdevice yin the .remote control box; v Fig. Mis a detail of an element constitutingacontactbar; l.

. Fig. 15 is a detail ofwan element yconstituting` the lower series of switches; and

Fig. 16 is a Wiring Vdiagram of 'the-electri'cal; connections.

The;` movable member ofv the automatic tuner, which is thepart lthat carries the man-1 ually actuable devices that are adjustably related thereto, is operatively connected in any suitable vWay With the tuning yelements or resonance-varying devices of .thegreceiving set,4 In the illustra-ted construction this, mov-v able member is ashaftl and the tuning element is a variable condenser 2, only a portion of which is shown and which is support ed in the cabinetl by .a bracket above the tuning mechanism. The: operative connectionV consists ofthe twopulleys 3 and lon one end ofthe shaft 1.and apulley-5 on the .condenser shaft Whichare connected by acord belt 6,

" the ends of which are connected"` to the pe-.vr

ripheries of the pulleys 3 and 4 and which run over the idlers 7 and '8 intermediate of the pulleys, these idlers being secured` in brackets on the base plate 9. Therotation of the shaft lis thus transmitted to /thevcondenser 2.

- vThe shaftfl is journaled in side frame members 1() and 11 and is .provided With `four keyWa-ys 1a alongv kan enlarged intermediatel portion, as sh`cWn-clearlyinFig 1. Mounted vupon this enlarged portion of the shaft are a which areY plurality, shownl as ten, of pinions numbered from 12a to 12j, inclusive. e These pinions are eachprovided With a-singletooth 13 and vare loosely mounted upon the shaft.` Between the pinions are friction'discs 14 keyed to theshaft, `and a friction disc is also provided at the right end.;l 'The engagingvfaees of the discsna'nd pinions are beveled, vthe pinions having akwidenedV peripheryand the discs; having a narrowedperiphery. In ythis .Way,A

the tooth 13 ismadelwider than thehub of the pinionso as to provide a'r fairly lbroad engaging -facefor the teethon the actuating in k,the-side frame V11 and atits'inner end in. a

A at each end of the pack,the disc 14a' being at the left end and the disc 14bvbeingbracket 19 formedon the upper edge of av e casting. 20. A beveled gear .21on the inner the front Wall of the cabinet. A knob 27 on 1A e this .stemv 28` affords means [for manipulation ofthe gear train justdescribed, the knob being, in this manner, brought to 'thecentralvertical yline of the panel. j

AThrough this connection the, turning of the knob 27 serves to back off-*and screw upjth'e clamping nut 15 rand thereby lrelease andun clamp 4the pinions. Three coil springsy 28, oney of which is showny in Fig, are seated in vrecesses in the inner face ofthe clamping nuty 15 and these springs at kall times kbear against the outer face of a Washer 29 on the shaft 1 immediately adjacentthe friction disclflb and ,thereby serveto exert a light frictionalpressure upon the pack even when thenut 15 is backed away. This pressure is to hold the pinions accidentally' duringthe Setting of any one pinion. ,y l

1 Backof the `clamping nut 15, the shaft 1 has an abutment30,'vvhich is shown vas a. collar fixed upon the shaft.

sufficiently yin frictional engagement i With the shaft to `prevent their .displacement yThis abutment per.

mits of just enough travel of the nutto clamp A and release the pinions. The engagement of the nut against theabutment 30 serves to lock the nut to the shaft againstrelative rotation. In this Way, thenut 15 is connected to rotate the shaft 1 and hence the movable `part of the tunino' element v2 when the vpinions are un-v clamped and free to beturneduponthe shaft 1. It'will also be observed thatwhen thenutisinjxits clampingposition, it is frictionally locked to theshaftthrough the. friction discs and that, therefore, the knob 27 and pinions may be employed to adjust the tuning element in both positions-of the clamping nut.

. Tlie-outerfrictiofn disc 14a has a lateral lll) stop proj ection140, Which cooperates'with a fiange 10a onthe inner face oftheside plate 10 to limitfthe rotation of-fthe shaft l. When `it is desired to back olf thenut 15, the knob i 27-is turned in a proper direction until the y stop v'members :.10ct and 1 14C engage, yWhereupon further rotationiof rthe shaft 1 is pre.n vented and lthe continued turning ofthe knob serves to feedthe nut in backward directionA untilfitlengages the abutment 30:y Nhen the knob is thereafter `turned in the, opposite di-` rection,`the shaft 1 Will'turn With it due to the rfrictional engagement between the nut v andthe abutment 30until the shaft reaches its opposite limitA of movement.Y Thereafter yfurther turning. of the knob Will serve to feed 1 'the nut forward' and clamp the; pinions and friction discs together.

Thefmanual operati ng elements are shift-` able into engagement selectively with any one of the pinions. They are carried by a support which consists of a two-part casting 3l. This casting has a hub portion 32 at its front end which slides upon a transverse guide rod 33,

and is also provided with jaws 34 which slide upon a rear transverse rod 35 the upper jaw carrying a roller 36 which bears upon the rod A35. This casting has a downward annular projection 37 which axially surrounds the shaft 1 and the parts mounted thereon. The inner faces of the two halves of the annular portion of the casting are recessed and within this recess with their axes in line with the annular part 37 of the casting are two annular gears 38 and 39, each gear having on its outer lateral face a flange 40, which fits within the inner peripheral face of the extension 37 ofthe casting as a bearing. These two `gears have their inner faces continguous and together are slightly wider than the face of a pinion 12 and the tooth 13 thereon. The outer periphery of the gears is provided with gear teeth and. each gear has on its inner periphery a single tooth 41. The inner diameter' of the gears is such that the teeth 41 will strike the tooth 13 of any pinion as they are rotated about that pinion.

On the upper part of the casting 31 at the top of the recess between the two inner faces of the halves is slide-bly disposed a rack 42 which runs from front to rear of the casting and has its front end protruding out through a horizontal slot'in the front panel of the cabinet. On this front panel is secured a knob 43, back of which is an index pointer 44, the rear part of which extends through the slot back of the knob and is secured to the front face of the casting. The rack 42 has operative connection with both gears 38 and 39, the width of the rack equaling the combined width of the two gears. This conneeg tion is such that the movement of the rack rotates the two gears in opposite directions. For this purpose the rack is shown as geared to the gear 39 through a single pinion 45, and as geared to the gear 38 through `the two pinions 46 and 47.

A convolute spring 48 serves to retract the rack 42 after it is withdrawn by hand to effect a tuning operation. This spring is attached at one end to the rear end of the rack 42 and is bent around an idler pulley 49 on the rear of the casting and is connected at its other end to a pin on the casting below the jaws 34. A decorative escutcheon plate 50 is disposed on the front panel above the slot in the panel through which the rack extends and slides, and in this escutcheon plate immediately above the slot there is secured a strip 51 on which are marked the initials of the several stations to which the set may be automatically tuned. Back of this strip is a transparent opening at the rear of which is a light 52 for interior illumination of the strip. The top of the guide shaft 33 is provided with a series of notches 53, which notches register with the initials of the several stations on the strip 51, and these notches are in direct alignment with the several pinions 12. A bifurcated bell crank lever 54 is pivoted to the hub 32 of the casting 31 directly above the rack 42. Journaled between one pair of arms of the lever 54 there is a cam roller 55 which is held in contact with the top of the rack 42 by a convolute spring 56. To the other pair of arms of the bell crank lever there is secured a lateral extension 57 which is adapted to register with the appropriate notch 53 in the top of the guide shaft 30 when the rack is pulled out. A strip 58 onthe top of therack 42 is of a. height to raise the cam roller 55 suliiciently to depress the extension 57 into the notches in the top of shaft 33 when the rack is pulled out, and the strip is of such a length that it terminates just back of the cam roller 55 when the rack is retracted.

Each pinion is set in proper position to bring the timing mechanism and the receiving circuit into resonance with the particular station which the pinion represents, in the following manner: The knob 27 is turned so as to back off the nut 15 and releases the compression upon the elements on the shaft 1. The `springs 28 continue to exert a. pressure upon the elementsso as to hold the pinions against turning until positive force is brought to bear upon them. If it be desired, for example, to set the pinion 12g so that its actuation will tune the set to WAAM, the knob 43 with the rack and other parts carried by the casting 31 are moved over to register with theV slot 53 registering with the station WAAM, which is the position of the parts shown in Fig. 3. The rack 42 is then withdrawn. This movement rotates the gears 38 and 39 in opposite directions and the teeth 41 cooperate to move the tooth 13 on the pinion 12g to the position where the teeth 41 meet. The pinion is thus locked in this position. Due to the releasing of the clamping pressure of the nut 15, the shaft 1 may now heturned within the pinion 12g and the pinion 12g will be restrained from rotation by engagement of the teeth 41 with the tooth 13. The other pinions will, however, turn with the shaft without altering their angular relation thereto due to the pressure of the springs 28. In order to turn the shaft 1 within the pinion 12g and thereby tune the set to WAAM, the operator has only to turn the knob 27, for the nut 15 is now locked to the shaft 1, as above explained, by reason of the engagement of the nut 15 and the abutment 30. l/Vhen the set is tuned to station VVAAM, the operator will release the rack and further turning of the shaft 1 by the knob 27 will thereafter carry the pinion 12g with the shaft without changing its angular relation thereto;V The operator will, therefore, turn the knob until lpinionjilQg to the shaft, .also lockedfto'the shaf-tbyreason of its fricrafter lwhich further turning .of the 4knob will screwfupthe nut and positively `clamp the The nutis thereby `tional engagement with the Washer 29,y and the yoperator may use thek knob 27 or .tun1ng the set and at the same time -therackoperated 'parts may be .used orfautomatically tuning `sented lby the ten fpinions.

yrepeated kWithfall ofthe other 15 l spect to :the always lthe setI to 1 anyk one otk the ten 'stations repre- Itwill be understood that the stepsabove described for: setting the pinion 12g Wilt be pinions, theset being tuned to the respective stations which ythe several pinionsrepresent. a Whenever the `gears 38 and 39are moved into register withA any vpinion and the rack is withdrawn, that E.pinion .Will .always be'vvmoved to the position which it occupiedzvvhen itwas 'set With-re` 1 land ,it Will, therefore, movethe tuning element to the proper @Positqn t@ time the ySet yto `the` station `which it represents.V 1 .Y

`fing 'application The mechanism sofar described is theautom'atic tuning mechanism of my said copend- Serial; No. 355,190 with k certainimprovements whichfconstitute the'subject matter of my copending'jl application vSeria-lNo. 377,709. f I shalljnovvV describe .the

.1 -emoto control part "ofthegmechanism This f inthe kmain lcomprises means,acting'-,upon the cally what the automatictuner ,tojcause it'jto do automatioperator doesl manually by manipulating the knob 4 3., -In othervwords, the illustrated embodiment of my yinvention `causes the,rack.42totravelflaterally to bring the g'earsy381and 39 into register Withtthe pinion representing the selected fstation. and longitudinally in anl outwardv then kto .move direction and actuate thev inion 12to bring l.the `set into resonance` Wit the selectedstaf yber Washers beingn interposed -todeaden the there 1s seemed. a wear ,is conneetedth'rough 'altrain presently to be against khe Poiv'erwis. delivered tothe mechanismffor the automatic operation by an electric motor 59 which is; ,attached to the base .plate 9,r 1ib sound,andcusliion.the vibration. This motor described to a transverse screw shaft` bearmg in theside .fframefmember 10 and a thrust bearing berll. Thef'shaft 60 extends through :a hub `portion-not thepinion 4 7 which is journaled in .the casting 31 and (dzonstitutestheV aforementioned nut. Thisu pinionjbears against the side of the casting through athrust bearing '62. Internal/projections 63 are formed on the nut'portionjofthe pinion 47 andfity in the threads of the-screw shafty 60.k

n Clockwise rotation of Athe shaft 60, as viewed in Figure 1, .will advance the pinionalongthe shaft`, and

r,the pinion bearing 'against Athe side ofthe two part casting willmov'eithe `casting laterally, rotation of g the Epinion being ref strained is resiliently urge The spring 64ff s secured, at .one end ,to f' the hubl32 ofthe casting 31A surrounding :the 'rod 33 andis bent around an; idler pulley vv65 on 7 i y5 vslotted abutment guide Y on the casting 20 in `the :slotsfof `which the .lever is, controlled by .levers are.;pi-votally1y supported in slotsv k7() formed in :the-casting 20. The solenoidsj69 are supported on the baseplate 71, onoppo.- Lsitesides of. theguide member 68, the-s o1e lnoidis being disposed, five on one sideand tour.onthetotherzside fof the member 68 in three andtwo onone `sideiand two andtwoon the other. ,slotsin the castingQOin which the abutment levers are *:Pvotally ,intermediate the solenoids and the memberS.y AThe norm alposition of: the levers 466, to whichv by' springs V'72, is abutment end of the levers is,-withdravvn out the casting 31, rand f-theoppositeendj is sus- -gpendedlabovefthe-solenoids-69. As a solenoid k69 energized,xit

action fraises the .finto the path of the c .38 and 39 gregi path of :the f .casting 61 securedtovtheside frame meme A y* y A at a remote point by means of a controller der y67 -,ffurther movement ,longitudinally `of ythe screw ,ion rotates with theraek42. g,

The normal position of vthe rackfis at the yright, as shownm Figure2, or as viewed from the front Y of they cabinet,;to which position -it. 1

d by a convolutespring.` 64.

the side f frame member 11 and lconnected at the lother end to, -the side framemember'k 111 .nearfthebase thereof.A 1 The distance the rack rwill be moved laterally from thenormal positionby rotation of the shaftj() is determinedl v ybyabutment levers-6 6 .which are insertable into the 'pathfof the, casting 32; 'Iher'eare the.' pinions 12a 'to 1.2i, the, abutment `for the `pinion 12j2being a4 stop shoulder 67 on la yends of the levers '456. are received.l Each two kstaggered rows* of The mounted `are l disposed they .are yresiliently. urged that position in which the ofthepanof opposite endof the vlever guide member and outofthefslotjin the p y Y asting'l. The abutmember 68 formed l' a solenoidl 69.: The

attracts -.the end of the abutmentflever ksuspended .thereover, which by the zfriction of the -trainy connecting lit to in all nine abutmentlevera-one :for each ofy ment .end ,of 4 the levers arev so disposedthat V a' proj ection, on the V casting v31 to `Which pinion Tliefinsertion of afleverinto .the is o controlled manually strainedf Consequently,lthe internal projec-v tions on` ,the pinion Wedge `against `the side of v vthe threads inthe screw shaft 60 and the pin- .the shaft, .thereby g rotating l V,the annular gear-38land causing longitudinal movementof therack 42 the'pinion 46 which movementoffthe ,K rack rotatesy v. the Y ster .With the appropriate ng31` eaches the abutment .plate 74 .will abut 83. VThe end of theshaft 86 annular gear 39 through the pinion 45 ina directionV opposite to that of the' gear 38. When the instrument is tuned and the shaft is released, the casting 31 is returned toits initial position by the aforementioned spring 64, the rack being retracted by the spring 48.

- The pinion 46 is mounted upon a square shaft which isjournaled at one end in the side member 10 Vand threaded at the other end in an'openngin the side member 11, the pinion 46 being adaptedto be moved longitudinally of the shaft and be secured thereto against relative' rotational movement. On the side member 11 there is secured a switch 7 6 having a movable member 7 7 andstationyary memberl 78, the two members being ing Collar 108 fixed to the rod 107 and constitutes the selective sulated from each other and from the castin by insulating material 79. The switch 76 is secured to the side member 11 of the casting byv screws 80. The movable member of the switch is directly Vin line with the end of the square shaft 75 so that when the shaft is rotated by the pinion 46 and is moved longitudinally by virtue of its threaded connection Vwith the side member 11, the end thereof `will 'abut against the movable member 77 of the 'switch and close the switch. The movement of the shaft is such that the switch will be closed when the raclrhas reached'its outermost position and the set is tuned.

The motor 59 is connected to the Yshaft 60 through reduction gearing and an electromagnetic clutch. The shaft of the motor is coupled'to a shaft 81 through ay gear train 82. The Vshaft 81 bears in a two part casting 83 and on the inner end thereof within the casing a worm 84 is securedV thereto for rotation therewith. The worm 84 meshes with a worm gear 85 secured to the reduced end of a shaft 86 which bears inthe casting 83. The shaft 86 extends through a partition wall 87 within a compartment 88 formed in the casting within the compartment 88 is enlarged and constitutes the vcore of an electromagnet 89, the casing 90 thereof which constitutes a pole of the electromagnet is secured to the shaft 86 by means of a set screw 91. Around the casing of the electro-magnet, there are two collector rings 92 and 93 insulated from the casing and each other by a strip of insulating material 94. These collector rings are connected to the coil of the electromagnet and are energized by brush contacts 95 similar to ordinary brush contacts of a motor. The inner or active end of the electromagnet is adjacent to and in alignment with the screw'shaft 60 of the automatic tuning mechanism. To the end ofthe screw shaft 60 adjacent the electro-magnet, a Vcollar 96 having an arm 97 is secured by means of a set screw 98. Apin 99 movably mounted in a bushing formed on the outer end of the arm 97k is secured to a disc 100 which lies within the field of the electro-magnet 89. The disc 100 is resiliently urged away trol 121. A knob is also secured to from the face of the electro-magnet by a spring 101 acting between the arm 97 and an abutment plate 102 secured to the pin 99. Adjacent the op-posite end of the shaft 86 journaled in another section 103 of the casting 83 there is a stub shaft 104 having a flange 105 formed at one end thereof and bearing against the outer end of the bearing formed in the casting, yand a worm 106 formed on the end adjacent the shaft 86 and bearing against the inner end of the bearing formed in the casting. The shafts 86 and 104 are in alignment and are bored to receive a rod 107 which extends through the two shafts and is connected to the disc 100 to be moved thereby. Intermediate the shafts 86 and 104 there is a element of the clutch device. The collar 108 is provided at each end with projections 109 and 110 which are received in notches 112 and 113 in the ends of the stub shaft 104 and the shaft 86 respectively. The projection 109 and its complementary slot 112 are substantially longer andthe slot 113 and are of such length that the projection 109 and the slot 112 are always inengagement. The projection 110 and its complementary slot 113, however, are of such length that when the disc 100 is attracted tothe electro-magnet to couple the shaft 60 to the shaft 86 the projection 110 and its complementary slot 113 are out of engagement, thereby disconnecting the shaft `104 from the shaft 86.

The worm 106 formed on the shaft 104 `meshes with a worm gear 114 loosely mounted opposite bearing, there is a plate 117 secured to the shaft 115. Between the plate 117 and the worm gear 114, there is a convolute spring 118 which resiliently urges the worm gear 114 into frictional engagement with the bcaring collar 116. At one end of the shaft which extends outside of the casting 83, there is secured for rotation therewith, a pulley 119 whichV is connected byV means of a belt 120 to the'movable element of the volume conthe movable element of the volume control for manual control of the volume, the gear 114 being looselyY mounted on the shaft 115 so as to perlmit manual operation of the volume contro On the side of the casting 83 adjacent the flange 105 on the end of the stub shaft 104, there is secured a switch 122 having amovable element 123 and a `stationary element 124. `The switch is secured to the casting by machine screws 125 and insulated therefrom by insulating strips 126. The movable meml ber 123 lies across a continuation of the rod 'rol Monroe f box and mechanismwwhich are situated at .av

remote point, are illustrated in 1'0 to l inclusive. p'lkhof'box has -a cast back128 and a cast ycover 129 Aconstituting the sides and front with an outlet for a 'cable iny an end wall. The cover 129 is secured to theV back 128 by screws 1 30.' "Ne'a'r one 4end of thejcast bottom at the longitudinal center vthereof,a stub shaft 131 is rotatably mounted therein: and extends' perpe'ndicularly thereffrom. On the f shaft"`1-31 there *isfslidabl `mounted casting 132 which extends throug lthe top ofthe control box.`v` Near theupper'` .end of the casting132, upwardlyextending parallel projections 133 are formed which i yare adapted; to be received inidepre'ssions134 on the inner surfacevoflthe top of 'the control box* At thelowerendof the castingf132, there is provideda groove 135 which houses afconvolute spring 136 which'resiliently urges the casting 132 toward the top of the control box and retains the projections 133 in the de`V pressionsn134. A portion 4of the outer wall of the spring housing 135 is extended to form va downwardly r4extending projection y i137 which is adapted .tol register withopeningsY 138 in 'the back of the control box.y Move'-k vment `of the casting 132 in 'a longitudinal 'direction is limited by a machine screw139 engaging a groove 140 iny theshaft 131. On.

the end of the casting132 extending above the Vtop of thecontrol box,there is secured a knob l141 having a radial indicating pointer 142.l -In ,the top ofthe box, there is alsor a plurality 'of equally spaced radial slots 143, shown as ten in number, disposed about the rvcenter of the knob 141.y Beneath theslots' are placed transparent strips 144 uponwhich the call letters of the variousbroadcasting vstations are indicated corresponding to the callletters on the strip on the rontpanel of the receiving set. The depressions 134 in the inner rsurface of the top of thev box. and the openings 138 inthe back of the-box are in alignment and correspond to the slots in which the 'station indicating strips are placed.

' The electrical circuits are so arranged that when the operator rotates the casting 132 into register with anyone of the stations indicatedl ons the strips in the slots 143 and presses 'down on the knob to move the vcasting against vthe action of the spring 136, a solenoid 69 cor.-

responding tothe said stationk will beenerfset by a rod fito y gized and attract its lever into vthe path of the casting 31, and the motor will be energized `This is effected through a series of switchesagainst the back 128 of the $70 simultaneously.

box.v` As shown Ythere 'are' two series' "of switches, a bottom series 145 which is a circular conducting bar havingten individual radialcontact strips; and an upperseries 146 f often separate and insulated radial strips. "The two series are disposedin pairs, one im-V 'mediately above the other, and the depression u Vof the knob 141 serves, through thev medium {of fa radial projection 147l in` alignment with the pointer 142 and carrying a knob 148 Lof inl ,sulating'materiah to move the contactpoint ofthe strip 146 with which itregisters into contact with the contact point on the strip 145 immediatelybelow it, vvand a continued movement of the knob 141 presses the lower contact strip against a contact point ony a circularbary 149 which runs 'underneath allv of the contacts.V

Lamps 150 yand 151 are supported on a bracklet upon the side wall of thefboximmediately behind ia fred 'lens 152 and a 'grefynflensV 153 vin vthe 'front face. -Two volume (control 'switches are also provided, 'one forincreasin'g the-volume and the 'other fordec'reasing the volume. Y Bothof the volumecontrol switches are double throw switches, one having a single W5 pole and v the other having'three poles. l The threepole switch consistsof three sets of three-r separate contact strips 154, and 156' disposed one immediately *below the other, the intermediate set 155 being extendedfbeyondthe endsV of the upper and lower'sets and having an insulatingcross barg157` connecting them together l chani'calmovement. Normally,l the intermediate setA is in. contact withthe` upper set Vand is depressed into contact 'with the lower 'of 'the control box. "The rod -158fis-alig11ed with the insulating Across bar 1-57 connecting d the outer ends of the middle strip Iand has a knob 160 secured lto the endextending above fthe'front faceof kthe controlvv box. The rod 158 'is resiliently urged'to the inoperative position byk a convolute spring 161.` vThe single pole volume control switch is similar `in all respects to the three pole switch just described having three Contact strips 162,163 .and 164 -disposed one immediatelyabove the other.

A two way switch`165 is also provided in the front wallfof` the control box; Y

- The electrical rconnections for the remote for simultaneous me# f 4 158 extending through a bushing I 159 formed on the inner side of the front face no l uns Y controler *the automatic vtuner are shown diagramm'atically in' Fi'gure16,the connec- 'A tions being asfollows: Y

110-6.18 volt transformer 166 and the receiving set areconnected in multiple being completed `through la 169 at Vthe setand the two wayCswitch-165 kat the .remote controlb'ox.` There isfalso afi line wires167. and 168, the connection j two-way switch f f master switch 170 connected in multiple with the two Way switches 169 and 165 to complete the circuit to the set and the transformer independently of the two way switches. The secondary .side of the transformer constitutes the source of energy for the remotecontrol mechanism. The transformer has two taps, one of which supplies six volts and the lother eighteen volts. The .side of the transformer common to the six and eighteen volt taps is connected by means hof a wire 171 to a wire 172 in the remote control box. To the wire 172, which is common to the lower contact strip 1567" at the right of the three pole double throw switch and the lower contact strip 164 of the single pole double throw switch at the remote control box, one side of the lights 150 and 151 and the contact strips145 are connected. The other side of the light 150 is directly connected by a wire 173 to the six volt tap on theV transformer. Thus, the light 150 is directly connected to the transformer and is energized whenever the transformer is operating to indicate when the receiving set is turned on. The other side of the light 151 is connected to the six volt tap of the transformer through the switch 76 on the side frame member 11 which is actuated by the longitudinal movement of the square shaft 75 to complete the connection to the light 151 when the set has been timed by the automatic tuning device. The eighteen volt tap of the transformer is connected-to one side of the field 174 of the motor 59 'by a wire 17 5. One side of each of the solenoids 69 is connected in multiple through a contact bar 17 5a which is connected to the wire 175 through the wire 176. The other sides of the solenoids 69 are connected through individual contacts 177 to the individual contact .strips 146 at the remote control box. To the side of the field of the motor to which the wire 175is connected, one side of `a rectiiier 17 8 is also connected. The rectifier is adapted to supply direct'current to the coil 89 of the magnetic clutch to which it is connected by means of wires 179 and 180 through the brush contacts 95 and the collector rings 92 and 93. V, The opposite side of the field 174 of the motor is connected by means of a wire 181 to the intermediate contact strips 155-1 at the left of the double throw three pole switch at the remote control boX, two poles 155-1 and 1550 of which constitute a reversing switch, the upper Contact strips 154q1 and 154e being connected by means of wires 182 and 183 to the armature 184 of the motor and the lower contacts 156-1 and 1560 being connected to the upper contacts 154-1 and 1540 by cross wires 185 and 186. The upper contact 1547A of the remaining pole of the three pole switch is connected by means of a wire 187 to the alternating current side of the rectifier 17 8. Theqintermediate contact strip 1550 of the reversing .switch is connected by a wire 188 to the central contact strip 163 of the single pole double throw switch and to the contact bar 149. The remaining central contact strip 1557q of the three pole double throw switch is connected by` means of a wire 189 to the upper contact strip 162 of the single pole double throw switch. Thus, it will be seen that when the transformer is energized and the knob 141 is depressed to bring the contact strips 145, 146 into contact with the contact bar 149, the solenoid 69 associated with the contact 145 so depressed will be energized by a circuit as follows:

vFrom the transformer through wire 171 to Wire 172, thence through contact strips 146 and 145 to the solenoid 69 and through wires 17 Gand 175 to the opposite side of the transformer thereby energizing the solenoid which operates to raise the abutment lever associated therewith into the path of the casting 31. Further depression of the knob 141 to depress the contact strip 145 into con tact with the contact bar 149, completes a circuit to the motor and magnetic clutch as follows:

To Contact strip 145 as before, through Contact bar 149, and wire 188 to intermediate Contact strip 1550 of the reversingswitch, through the upper contact strip 1540 of the reversing switch, and wire 183 to armature 184 of the motor through the armature, wire 182, upper contact strip 154--1 of the reversing switch, intermediate Contact strip 155-1, wire 181, motor iield 174 and wire 17 5 back to the transformer. A second circuit is also completed through the intermediate contact strip 163,0f the single pole double throw switch, upper Contact 162, wire 189 tothe intermediate contact strip 1551" of the three pole double throw switch through the switch to wire 187, and the rectifier 178 to wire 175 and back to the transformen Thus, a circuit is completed to energize` the magnetic clutch, thereby connecting the motor to operate the automatic tuning mechanism.

The volume is varied by depressing either of the volume switches. If the single pole double throw volume switch is depressed a pircuit will be completed to the motor as folows:

To wire 172 as before, through lower contact strip 164 of the single pole double throw switch intermediate contact strip- 163, wire 188, intermediate central Contact strip 1550 of the reversing switch, wire 183, motor armature 184 and wire 181 to the lield of the motor, and thence through wire 175 to the transformer. It is to be noted that on depressing the single pole double throw switch the circuit to the magnet clutch is broken between the wires 188 and 189 thereby leaving the motor disconnected from the tuning mechanism. To vary the volume in the opposite directiomthe three pole double throw switch is depressed thereby y reversing the connections to the'armature of the motor complet-k in a circuit as follows: n

rom thetransformer to wireV 172 as before,the lower Contact strip 1567l ofthe three f pole switch, `through the intermediatey conftact :strip 1557", wire 189, upperandv intermediate Contact strips 162 and-1630i the single vpole double throwlswitch, wirey 188,

1 intermediate and lower contactstrips 1550 and 15`6`0,wire 185, upper contact 154-1,.wire 182, motor armature 184,\wire 183, upper eentral contact strip 1540, wire 186, lowerjand intermediate contact strip 15G-'e1 and'155-1, wire 181 to theiield ofthe kmotor and4 back toitheatransiormery as before, theicircuit tov the magnetic clutch beingy brokenl between upper and intermediate contactstrips 1547q andlr. l

The switch y122 operated byfthe magnetic clutch throughthe-medium lofthe rody107l is connected inthe Vloudspeaker circuit' by means ofthe .wires 190 and 191l so thatfwhen the magnetic clutch is energized, the switch willbleiopened and the loud speaker shut ofl"r during tlieftuning vof the receiving set.

y the loudspeaker. lVhen` the tuning of the' set iscompleted,tlieswitch 76`is closed. to,l complete thezcii'cuitto the signal lamp 150 i attherremotecontrolbox, and in res onse# t0. thesi'gnal, the .operator releases Athev nob 'F rom Lthe above description ofthe electri-` calzcircuits,l -ity willfbe apparent that upon 'piess'ingathe knob 141, the solenoid'69 associated with the contactstrip depressed will.- be energized-'to :insert an abutment lever Ainto the path ,of the casting 31, the electric mo-` j tor y59fw-i1lbe started andthe magnetic clutch will be'energized to` connect the transmission of `the tuning mechanism. tothe motor f and breakthe connection `between the motor `andthe volume control/and open the lcircuitto 141 permitting the various devices toreturnto .their `normal'position's. On actuating the single Apole.:volumewconti'ol switch, the m05v 1.. Inra radio reeeivingset, a movable memher'operativelyconnected 7to aftuni'ng ele-v mentof theset, amotor, a plurality of actun atingmembers for the movable inemberhav-A y ing adjustable'connection therewith, a. single operating member for the several actuating fmovable member.kk Y y l 5.y In a .radio receivingset, a movable mem# members shiftable l,selectively Tinto. i engage-'by ment therewith, operatingmeans forfeffect-i ingthe shiftingfand .operationfof `said oper-y f atingmember, and a magnetic clutch for controlling theconne'rction of thelmotor to Said operating means. Y 1 v 2.x 'In airadio receiving set, almovable member operatively connected to'` atuning lele# inentof the 'set,:a motor, aplurality ofactuzatingmenibers 'for the movable memberhavfingy adjustable connection therewith', a single operating member for theseveral yactuating members shiftable' selectively 'intovv engage.-

ment therewith, `operating ymeans for etfecting the shifting' andvoperationof said opel' ating member, anelectiomagnetic `clutch for controlling the. connection of the fmotorto said operating means, and manuallyl con-A energizing the magnetic trolledA means for clutch.- i

' 3.- Infa radioreceiving set, a movable mem-yr ber operatively connected `to a tuning .ele-

ment ofthe set, a motor, a plurality' of actu` ating members'for the movable meinberihav- Y. ing adjustable connectionther'ewith,y a. single operatingr'member for the severalractuatingy, members shiftable 1 selectively into engage-Y,A

ment' therewith, operating means forei'ectr ing the. shiftingand operation ofsaid-oper-1 ating member, an electromagnetic, clutchfor controlling the connection" of the' motor t0 said operating means, and a manual switch device vcontrolling theenergization offthe magnetic clutch arid'theinotor.

4. In a radio receiving set, a movable mein-4 ber operatively connected.l to affect the `volume of the soundv emitted,= another movable vmember ,operatively connected'to a tuning element of the set, aplurality ofactuating members y for the Vsecond mentioned' movable member having adjustableconnection therewith, ,a1

ies

powerdevice selectively 'connectibleto -`the severaly actuating members; and the irstjin'en-` tioned movable member to operate theksame, and manually controlled means for selectively i connecting the power device tothe several actuating members and the first mentionedl ber operatively lconnected to aect the volume ber `operatively connected toria `tuning-`ele` ment ofthe set, a plurality of actuating-mem? bers for the second`-mentionedniovable member having adjustable connection therewith,v an electric motor, means for selectively f'conl necting .the motorto the severalV actuatingf .means and the kfirst mentioned movable mem-iber, and amanual switch device controlling the operative connection andthe energiz'ar tionI of 'the motor.

6.-In la radio receiving set,amovable mem; f

lbei' .operativelyfconnected toaifect the "-volf-v Y unie of the sound emitted, another movable Y' member operatively connected to a tuning'ele' 150 iis of .the.soundemitted, another lmovable memc connections,

ment of the set, a plurality of actuating members for the second mentioned movable member having adjustable connection therewith, manually operable means for selectively operating the actuating members, additional manually operable means for operating the first mentioned movable member, any electric motor selectively connectible to operate the manually operable means for the actuating members and the manually operable means for the'irst mentioned movable member, and a manual switch device controlling the operative connection of the motor and manually operative means yfor the actuating members and energizing the motor. Y

7 In a radio receiving set, a movable member operatively connected to affect the volume of the sound emitted, said movable member being movable in one direction to increase the volume of the sound emitted, and in the oppositevdirection to decrease the volume of the soundemitted, manually operable means for the movable member, another movable member operatively connected to a tuning element of the set, a plurality of actuating members for the second mentioned movable member having adjustable connection therewith, manually operable means for selectively operating the actuating members, an. electric motor selectively connectible to operate the manually operable means for the actuating members and the manually operable means for the first mentioned Vmovable member, and a manual switch device controlling the operative connection of the motor, the manually operative means for the actuating members and the direction of movement of the first mentioned movable means, and energizing the motor.

8. In a radio receiving set, a movable member operatively connected to affect the volume of the sound emitted, another movable member operatively connected to a tuning element of the set, a plurality of actuating members for vthe second mentioned movable member having adjustable connection therewith, operating means for the several actuating members, an electric motor, an electromagnetic clutch for selectively connecting the motor to said first movable member and said operating means for the actuating members, and

amanual switch device netic clutch and the motor.

9. :In a Aradio receiving set, loudspeaker a movable member operatively connected to a tuning element of the set, a plurality of actuating members :for the movable` member having adjustable connection therewith, any operating member selectively connectible to the several actuating members to operate the same, a power device connectible to the operating member for operation thereof, and means operative in response to the connecting of the vpower device to the opcontrolling the magenergization of the V erating member for affecting the loud speaker connection to cut out the loud speaker during' l0. In a radio receiving set, loud speaker` connections, a movable member operatively connected to a tuning element of the set, a plurality of actuating members forthe movable member having adjustable connection therewith, a power device selectively connectible to the several actuating members to operate the same, manually controlled means `for selectively connecting the power device to the several actuating'members, and means operative in response to the connection of the power device to operate the actuating members for affecting the loud speaker connections to cut out the loud speaker during operation oi' the actuating members.

l1. In a radio receiving set, loud speaker connections, a movable membery operatively connected to a tuning element of the set, a plurality of actuating members for the movable member having adjustable connection there-- with, a single operating member for the several actuating members shiftable selectively into engagement therewith, operating means for effecting the shifting and operation of said operating member, an electric motor, a clutch for controlling' the connecting of the motor to said operating means, and means operative in conjunction with the clutchJ for affecting the loud speaker connections to cut out the loud speaker while the motor is connected to the operating means.

12. In a radio receiving set, loud speaker connections, a movable member operatively connected to affect the volume of the sound emitted, another movable member operatively connected to a tuning element of the set, a plu-I rality of actuating members for the second mentioned movable member having adjustable connection therewith, a single operating member for the several actuating members shi'ltable selectively into engagement therewith, operating means for effecting the shifting and operation of said operating member', an electric motor, a clutch for selectively connecting the motor to the operating means and the first mentioned movable member, means for controlling thev action of the clutch, and the energization of the motor, and means operative in conjunction with the clutch for affecting the loud speaker connections to cut out the loud speaker while the motor is connected to the operating means.

13. In a radio receiving set, loud speaker connections, a movable member operatively connected to aect the volume of the sound emitted, another movable memberA operatively conn-ected to a tuning element of the set, a plurality of actuating members for thev second mentioned movable member having adjustable connection therewith, a single operating member for vthe several actuating members shiftable selectively into engagement therewith, operating means for effecting the shifting and operation of said operat. ing member, anelectric motor, an electromagnetic clutch for selectively connecting" the motor to the operating means and the first mentioned movabley member, a manually operable switch device for controlling the action of the clutch and ythe energization of y the motor, and means operative in conjuncthe kswitch to be energized by the closing thereof, and an electric motor operatively related to the operating member. n c

In witness whereof, I hereunto subscribe my signature.

LOUIS H. MORIN.

tion with the clutch for affecting the loud Y* i speaker connections to cut v out the loud speaker while the motor isconnected to the operating means.

14. In a radio receiving set, a tuning device comprising `a movable member operatively connected Vto a tuning element kof theset, a plurality of actuating members for the movable member having adjustable connection K' therewith, a single operating member for the several actuating members shiftable selec-V Y tively into engagement therewith, ka shaftl journaled at one end in the tuning device and threaded in the tuning device at the other end7 whereby rotation of Ethe shaft causes longitudinal movement thereof, a pinionl splined on the shaft operatively associated with the operating member for the actuating members, a switch in the path of the longitudinal movement of theshaft a pilot light associated with the switch to energized by the closing thereof, and an electric 1 Vmotor operatively related to the operating therewith, a single operating member for the several actuating members `,shiftable selectively intoV engagement therewith, an operating pinion connected to the operating member for operation thereof and secured to the operating member against relative lateral movement therebetweenfa screw shaft extending through they operating pinion and journaled in the tuningdevice so as to prevent axial movement thereof, internal proJections on the operating pinion engaging the threads in the screw shaft for irst'advancing the operating member into its selective engage ment with the actuating `member upon rota- A tion of the screw shaft and then frictionall engaging the sides of the threads inthe sha t to rotate the pinion therewith for operation of the operating member, another shaft journaled at one end in the tuning device and Y threaded in the tuning device at the other end so that rotational movement of the shaft is translated into longitudinal movement thereof, a pinion splined on the second mentioned shaft operatively connected to the pinion on the screw shaft, a switch in the path i of the longitudinal movement of the second mentioned shaft, a pilot' light connected to Y 13ov 

